EP3547768A1 - Temporisation du réenregistrement cellulaire pendant des conditions critiques - Google Patents

Temporisation du réenregistrement cellulaire pendant des conditions critiques Download PDF

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Publication number
EP3547768A1
EP3547768A1 EP19154775.1A EP19154775A EP3547768A1 EP 3547768 A1 EP3547768 A1 EP 3547768A1 EP 19154775 A EP19154775 A EP 19154775A EP 3547768 A1 EP3547768 A1 EP 3547768A1
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EP
European Patent Office
Prior art keywords
wireless device
registration
configuration update
update command
conditions
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
EP19154775.1A
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German (de)
English (en)
Inventor
Shivani Suresh Babu
Krisztian Kiss
Lakshmi N. Kavuri
Srinivasan Nimmala
Yifan Zhu
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Apple Inc
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Apple Inc
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Filing date
Publication date
Application filed by Apple Inc filed Critical Apple Inc
Publication of EP3547768A1 publication Critical patent/EP3547768A1/fr
Pending legal-status Critical Current

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W4/00—Services specially adapted for wireless communication networks; Facilities therefor
    • H04W4/50—Service provisioning or reconfiguring
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W60/00—Affiliation to network, e.g. registration; Terminating affiliation with the network, e.g. de-registration
    • H04W60/04—Affiliation to network, e.g. registration; Terminating affiliation with the network, e.g. de-registration using triggered events
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W76/00—Connection management
    • H04W76/50—Connection management for emergency connections
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W24/00—Supervisory, monitoring or testing arrangements
    • H04W24/08—Testing, supervising or monitoring using real traffic
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W84/00—Network topologies
    • H04W84/02—Hierarchically pre-organised networks, e.g. paging networks, cellular networks, WLAN [Wireless Local Area Network] or WLL [Wireless Local Loop]
    • H04W84/04—Large scale networks; Deep hierarchical networks
    • H04W84/042—Public Land Mobile systems, e.g. cellular systems
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
    • Y02D30/00—Reducing energy consumption in communication networks
    • Y02D30/70—Reducing energy consumption in communication networks in wireless communication networks

Definitions

  • the present application relates to apparatuses, systems, and methods for delaying cellular re-registration during critical conditions.
  • Wireless communication systems are rapidly growing in usage.
  • wireless devices such as smart phones and tablet computers have become increasingly sophisticated.
  • mobile devices i.e., user equipment devices or UEs
  • GPS global positioning system
  • wireless communication standards include GSM, UMTS (associated with, for example, WCDMA or TD-SCDMA air interfaces), LTE, LTE Advanced (LTE-A), HSPA, 3GPP2 CDMA2000 (e.g., 1xRTT, 1xEV-DO, HRPD, eHRPD), IEEE 802.11 (WLAN or Wi-Fi), BLUETOOTHTM, etc.
  • wireless communication devices also creates a continuous need for improvement in both wireless communications and in wireless communication devices.
  • UE user equipment
  • UE user equipment
  • increasing the functionality of a UE device can place a significant strain on the battery life of the UE device.
  • wireless communication technologies under development including fifth generation (5G) new radio (NR) communication. Accordingly, improvements in the field in support of such development and design are desired.
  • 5G fifth generation
  • NR new radio
  • a cellular configuration update may request or ortherwise trigger re-registration by a wireless device receiving the configuration update.
  • re-registration may be expected in response to a configuration update command providing updated configured and/or allowed network slice selection assistance information.
  • Any active protocol data unit sessions may generally be released by the wireless device in conjunction with such re-registration. This could include interrupting emergency services and/or other critical communication sessions.
  • embodiments are presented herein of apparatuses, systems, and methods for delaying cellular re-registration during critical conditions.
  • the techniques described herein include network- and device- side approaches to delaying cellular re-registration during critical conditions.
  • the network may determine whether or when to provide a configuration update that would trigger re-registration based at least in part on whether any critical conditions are in effect. For example, the network may delay providing such a configuration update if a critical condition is in effect at the wireless device, and may proceed to provide such a configuration update if no critical conditions are in effect at the wireless device.
  • What constitutes a critical condition could be configured by the network operator, e.g., to include emergency calls and/or any of various other possible conditions, as desired.
  • a wireless device may determine at what time to respond to a configuration update that triggers re-registration, or at least at what time to perform the requested re-registration, based at least in part on whether any critical conditions are in effect at the wireless device. For example, the wireless device may delay responding to such a configuration update (or may at least delay the re-registration) if a critical condition is in effect at the wireless device, and may proceed to respond to such a configuration update and perform the requested re-registration if no critical conditions are in effect at the wireless device. What constitutes a critical condition could be configured by the wireless device, or indicated by the network operator in configuration information, among various possibilities, and may similarly potentially include emergency calls and/or any of various other possible conditions.
  • the techniques described herein may be implemented in and/or used with a number of different types of devices, including but not limited to cellular phones, tablet computers, wearable computing devices, portable media players, cellular base stations and other cellular network infrastructure equipment, servers, and any of various other computing devices.
  • Memory Medium Any of various types of non-transitory memory devices or storage devices.
  • the term "memory medium” is intended to include an installation medium, e.g., a CD-ROM, floppy disks, or tape device; a computer system memory or random access memory such as DRAM, DDR RAM, SRAM, EDO RAM, Rambus RAM, etc.; a non-volatile memory such as a Flash, magnetic media, e.g., a hard drive, or optical storage; registers, or other similar types of memory elements, etc.
  • the memory medium may include other types of non-transitory memory as well or combinations thereof.
  • the memory medium may be located in a first computer system in which the programs are executed, or may be located in a second different computer system which connects to the first computer system over a network, such as the Internet. In the latter instance, the second computer system may provide program instructions to the first computer for execution.
  • the term "memory medium" may include two or more memory mediums which may reside in different locations, e.g., in different computer systems that are connected over a network.
  • the memory medium may store program instructions (e.g., embodied as computer programs) that may be executed by one or more processors.
  • Carrier Medium a memory medium as described above, as well as a physical transmission medium, such as a bus, network, and/or other physical transmission medium that conveys signals such as electrical, electromagnetic, or digital signals.
  • a physical transmission medium such as a bus, network, and/or other physical transmission medium that conveys signals such as electrical, electromagnetic, or digital signals.
  • Programmable Hardware Element - includes various hardware devices comprising multiple programmable function blocks connected via a programmable interconnect. Examples include FPGAs (Field Programmable Gate Arrays), PLDs (Programmable Logic Devices), FPOAs (Field Programmable Object Arrays), and CPLDs (Complex PLDs).
  • the programmable function blocks may range from fine grained (combinatorial logic or look up tables) to coarse grained (arithmetic logic units or processor cores).
  • a programmable hardware element may also be referred to as "reconfigurable logic”.
  • Computer System any of various types of computing or processing systems, including a personal computer system (PC), mainframe computer system, workstation, network appliance, Internet appliance, personal digital assistant (PDA), television system, grid computing system, or other device or combinations of devices.
  • PC personal computer system
  • mainframe computer system workstation
  • network appliance Internet appliance
  • PDA personal digital assistant
  • television system grid computing system, or other device or combinations of devices.
  • computer system can be broadly defined to encompass any device (or combination of devices) having at least one processor that executes instructions from a memory medium.
  • UE User Equipment
  • UE Device any of various types of computer systems or devices that are mobile or portable and that perform wireless communications.
  • UE devices include mobile telephones or smart phones (e.g., iPhoneTM, AndroidTM-based phones), portable gaming devices (e.g., Nintendo DSTM, PlayStation PortableTM, Gameboy AdvanceTM, iPhoneTM), wearable devices (e.g., smart watch, smart glasses), laptops, PDAs, portable Internet devices, music players, data storage devices, or other handheld devices, etc.
  • the term “UE” or “UE device” can be broadly defined to encompass any electronic, computing, and/or telecommunications device (or combination of devices) which is easily transported by a user and capable of wireless communication.
  • Wireless Device any of various types of computer systems or devices that perform wireless communications.
  • a wireless device can be portable (or mobile) or may be stationary or fixed at a certain location.
  • a UE is an example of a wireless device.
  • a Communication Device any of various types of computer systems or devices that perform communications, where the communications can be wired or wireless.
  • a communication device can be portable (or mobile) or may be stationary or fixed at a certain location.
  • a wireless device is an example of a communication device.
  • a UE is another example of a communication device.
  • Base Station has the full breadth of its ordinary meaning, and at least includes a wireless communication station installed at a fixed location and used to communicate as part of a wireless telephone system or radio system.
  • Cell - The term "cell” as used herein may refer to an area in which wireless communication services are provided on a radio frequency by a cell site or base station.
  • a cell may be identified in various instances by the frequency on which the cell is deployed, by a network (e.g., PLMN) to which the cell belongs, and/or a cell identifier (cell id), among various possibilities.
  • Link Budget Limited includes the full breadth of its ordinary meaning, and at least includes a characteristic of a wireless device (e.g., a UE) which exhibits limited communication capabilities, or limited power, relative to a device that is not link budget limited, or relative to devices for which a radio access technology (RAT) standard has been developed.
  • a UE that is link budget limited may experience relatively limited reception and/or transmission capabilities, which may be due to one or more factors such as device design, device size, battery size, antenna size or design, transmit power, receive power, current transmission medium conditions, and/or other factors.
  • Such devices may be referred to herein as "link budget limited” (or “link budget constrained”) devices.
  • a device may be inherently link budget limited due to its size, battery power, and/or transmit/receive power.
  • a smart watch that is communicating over LTE or LTE-A with a base station may be inherently link budget limited due to its reduced transmit/receive power and/or reduced antenna.
  • Wearable devices such as smart watches, are generally link budget limited devices.
  • a device may not be inherently link budget limited, e.g., may have sufficient size, battery power, and/or transmit/receive power for normal communications over LTE or LTE-A, but may be temporarily link budget limited due to current communication conditions, e.g., a smart phone being at the edge of a cell, etc.
  • the term "link budget limited” includes or encompasses power limitations, and thus a power limited device may be considered a link budget limited device.
  • Processing Element - refers to various elements or combinations of elements. Processing elements include, for example, circuits such as an ASIC (Application Specific Integrated Circuit), portions or circuits of individual processor cores, entire processor cores, individual processors, programmable hardware devices such as a field programmable gate array (FPGA), and/or larger portions of systems that include multiple processors.
  • ASIC Application Specific Integrated Circuit
  • FPGA field programmable gate array
  • Channel - a medium used to convey information from a sender (transmitter) to a receiver.
  • channel widths may be variable (e.g., depending on device capability, band conditions, etc.).
  • LTE may support scalable channel bandwidths from 1.4 MHz to 20MHz.
  • WLAN channels may be 22MHz wide while Bluetooth channels may be 1Mhz wide.
  • Other protocols and standards may include different definitions of channels.
  • some standards may define and use multiple types of channels, e.g., different channels for uplink or downlink and/or different channels for different uses such as data, control information, etc.
  • band has the full breadth of its ordinary meaning, and at least includes a section of spectrum (e.g., radio frequency spectrum) in which channels are used or set aside for the same purpose.
  • spectrum e.g., radio frequency spectrum
  • Automatically - refers to an action or operation performed by a computer system (e.g., software executed by the computer system) or device (e.g., circuitry, programmable hardware elements, ASICs, etc.), without user input directly specifying or performing the action or operation.
  • a computer system e.g., software executed by the computer system
  • device e.g., circuitry, programmable hardware elements, ASICs, etc.
  • An automatic procedure may be initiated by input provided by the user, but the subsequent actions that are performed "automatically” are not specified by the user, i.e., are not performed "manually", where the user specifies each action to perform.
  • a user filling out an electronic form by selecting each field and providing input specifying information is filling out the form manually, even though the computer system must update the form in response to the user actions.
  • the form may be automatically filled out by the computer system where the computer system (e.g., software executing on the computer system) analyzes the fields of the form and fills in the form without any user input specifying the answers to the fields.
  • the user may invoke the automatic filling of the form, but is not involved in the actual filling of the form (e.g., the user is not manually specifying answers to fields but rather they are being automatically completed).
  • the present specification provides various examples of operations being automatically performed in response to actions the user has taken.
  • Figure 1 illustrates an exemplary (and simplified) wireless communication system in which aspects of this disclosure may be implemented, according to some embodiments. It is noted that the system of Figure 1 is merely one example of a possible system, and embodiments of the disclosure may be implemented in any of various systems, as desired.
  • the exemplary wireless communication system includes a base station 102 which communicates over a transmission medium with one or more (e.g., an arbitrary number of) user devices 106A, 106B, etc., through 106N.
  • Each of the user devices may be referred to herein as a "user equipment” (UE).
  • UE user equipment
  • the user devices 106 are referred to as UEs or UE devices.
  • the base station 102 may be a base transceiver station (BTS) or cell site, and may include hardware and/or software that enables wireless communication with the UEs 106A through 106N. If the base station 102 is implemented in the context of LTE, it may alternately be referred to as an 'eNodeB'. If the base station 102 is implemented in the context of 5G NR, it may alternately be referred to as an 'gNodeB'.
  • the base station 102 may also be equipped to communicate with a network 100.
  • the network 100 may include a core network (potentially including any number of core network slices) of a cellular service provider (e.g., a public land mobile network (PLMN)).
  • PLMN public land mobile network
  • the network 100 may include (or be coupled to) a telecommunication network such as a public switched telephone network (PSTN), the Internet, and/or various possibilities).
  • PSTN public switched telephone network
  • the base station 102 may facilitate communication among the user devices and/or between the user devices and the network 100.
  • the communication area (or coverage area) of the base station may be referred to as a "cell.”
  • the base station 102 and the UEs 106 may be configured to communicate over the transmission medium using any of various radio access technologies (RATs), wireless communication technologies, or telecommunication standards, such as GSM, UMTS (WCDMA, TD-SCDMA), LTE, LTE-Advanced (LTE-A), 5G NR, 3GPP2 CDMA2000 (e.g., 1xRTT, 1xEV-DO, HRPD, eHRPD), Wi-Fi, WiMAX etc.
  • RATs radio access technologies
  • WCDMA Wideband Code Division Multiple Access
  • TD-SCDMA Time Division Multiple Access
  • LTE LTE-Advanced
  • 5G NR Fifth Generation
  • 3GPP2 CDMA2000 e.g., 1xRTT, 1xEV-DO, HRPD, eHRPD
  • Wi-Fi WiMAX etc.
  • Base station 102 and other similar base stations operating according to the same or a different cellular communication standard may thus be provided as a network of cells, which may provide continuous or nearly continuous overlapping service to UEs 106A-N and similar devices over a geographic area via one or more cellular communication standards.
  • the base station 102 may function as a node in the radio access network (RAN) of a cellular network operator.
  • RAN radio access network
  • each UE 106 may also be capable of receiving signals from (and possibly within communication range of) one or more other cells (which might be provided by other base stations), which may be referred to as “neighboring cells”. Such cells may also be capable of facilitating communication between user devices and/or between user devices and the network 100. Such cells may include “macro" cells, “micro” cells, “pico” cells, and/or cells which provide any of various other granularities of service area size. Other configurations are also possible.
  • a UE 106 may be capable of communicating using multiple wireless communication standards.
  • a UE 106 might be configured to communicate using two or more of GSM, UMTS, CDMA2000, LTE, LTE-A, NR, WLAN, Bluetooth, one or more global navigational satellite systems (GNSS, e.g., GPS or GLONASS), one and/or more mobile television broadcasting standards (e.g., ATSC-M/H), etc.
  • GNSS global navigational satellite systems
  • ATSC-M/H mobile television broadcasting standards
  • FIG. 2 illustrates user equipment 106 (e.g., one of the devices 106A through 106N) in communication with a base station 102, according to some embodiments.
  • the UE 106 may be a device with cellular communication capability such as a mobile phone, a hand-held device, a wearable device, a computer or a tablet, or virtually any type of wireless device.
  • the UE 106 may include a processor that is configured to execute program instructions stored in memory. The UE 106 may perform any of the method embodiments described herein by executing such stored instructions. Alternatively, or in addition, the UE 106 may include a programmable hardware element such as an FPGA (field-programmable gate array) that is configured to perform any of the method embodiments described herein, or any portion of any of the method embodiments described herein.
  • a programmable hardware element such as an FPGA (field-programmable gate array) that is configured to perform any of the method embodiments described herein, or any portion of any of the method embodiments described herein.
  • the UE 106 may be configured to communicate using any of multiple RATs.
  • the UE 106 may be configured to communicate using two or more of GSM, UMTS, CDMA2000, LTE, LTE-A, NR, WLAN, or GNSS.
  • GSM Global System for Mobile communications
  • UMTS Universal Mobile Telecommunications
  • CDMA2000 Code Division Multiple Access 2000
  • LTE Long Term Evolution
  • LTE-A Long Term Evolution
  • NR Long Term Evolution-A
  • WLAN Wireless Local Area Network
  • GNSS GNSS
  • the UE 106 may include one or more antennas for communicating using one or more wireless communication protocols or technologies.
  • the UE 106 might be configured to communicate using either of CDMA2000 (1xRTT / 1xEV-DO / HRPD / eHRPD) or LTE using a single shared radio and/or GSM or LTE using the single shared radio.
  • the shared radio may couple to a single antenna, or may couple to multiple antennas (e.g., for MIMO) for performing wireless communications.
  • a radio may include any combination of a baseband processor, analog RF signal processing circuitry (e.g., including filters, mixers, oscillators, amplifiers, etc.), or digital processing circuitry (e.g., for digital modulation as well as other digital processing).
  • the radio may implement one or more receive and transmit chains using the aforementioned hardware.
  • the UE 106 may share one or more parts of a receive and/or transmit chain between multiple wireless communication technologies, such as those discussed above.
  • the UE 106 may include separate transmit and/or receive chains (e.g., including separate antennas and other radio components) for each wireless communication protocol with which it is configured to communicate.
  • the UE 106 may include one or more radios that are shared between multiple wireless communication protocols, and one or more radios that are used exclusively by a single wireless communication protocol.
  • the UE 106 might include a shared radio for communicating using either of LTE or 1xRTT (or LTE or GSM, or LTE or NR, etc.), and separate radios for communicating using each of Wi-Fi and Bluetooth. Other configurations are also possible.
  • FIG. 3 Exemplary Block Diagram of a UE
  • FIG. 3 illustrates an exemplary block diagram of a UE 106, according to some embodiments.
  • the UE 106 may include a system on chip (SOC) 300, which may include portions for various purposes.
  • the SOC 300 may include processor(s) 302 which may execute program instructions for the UE 106 and display circuitry 304 which may perform graphics processing and provide display signals to the display 360.
  • the processor(s) 302 may also be coupled to memory management unit (MMU) 340, which may be configured to receive addresses from the processor(s) 302 and translate those addresses to locations in memory (e.g., memory 306, read only memory (ROM) 350, NAND flash memory 310) and/or to other circuits or devices, such as the display circuitry 304, wireless communication circuitry 330, connector I/F 320, and/or display 360.
  • MMU memory management unit
  • the MMU 340 may be configured to perform memory protection and page table translation or set up. In some embodiments, the MMU 340 may be included as a portion of the processor(s) 302.
  • the SOC 300 may be coupled to various other circuits of the UE 106.
  • the UE 106 may include various types of memory (e.g., including NAND flash 310), a connector interface 320 (e.g., for coupling to a computer system, dock, charging station, etc.), the display 360, and wireless communication circuitry (e.g., radio) 330 (e.g., for LTE, NR, Wi-Fi, GPS, etc.).
  • the UE 106 may be configured to communicate wirelessly using multiple wireless communication technologies.
  • the wireless communication circuitry 330 may include radio components which are shared between multiple wireless communication technologies and/or radio components which are configured exclusively for use according to a single wireless communication technology.
  • the UE device 106 may include at least one antenna (and possibly multiple antennas, e.g., for MIMO and/or for implementing different wireless communication technologies, among various possibilities), for performing wireless communication with cellular base stations and/or other devices.
  • the UE device 106 may use antenna(s) 335 to perform the wireless communication.
  • the UE 106 may include hardware and/or software components for implementing and/or supporting implementation of features described herein.
  • the processor 302 of the UE device 106 may be configured to implement part or all of the methods described herein, e.g., by executing program instructions stored on a memory medium (e.g., a non-transitory computer-readable memory medium).
  • processor 302 may be configured as a programmable hardware element, such as an FPGA (Field Programmable Gate Array), or as an ASIC (Application Specific Integrated Circuit).
  • the processor 302 of the UE device 106 in conjunction with one or more of the other components 300, 304, 306, 310, 320, 330, 335, 340, 350, 360 may be configured to implement part or all of the features described herein.
  • FIG. 4 Exemplary Block Diagram of a Base Station
  • FIG. 4 illustrates an exemplary block diagram of a base station 102. It is noted that the base station of Figure 4 is merely one example of a possible base station. As shown, the base station 102 may include processor(s) 404 which may execute program instructions for the base station 102. The processor(s) 404 may also be coupled to memory management unit (MMU) 440, which may be configured to receive addresses from the processor(s) 404 and translate those addresses to locations in memory (e.g., memory 460 and read only memory (ROM) 450) or to other circuits or devices.
  • MMU memory management unit
  • the base station 102 may include at least one network port 470.
  • the network port 470 may be configured to couple to a telephone network and provide a plurality of devices, such as UE devices 106, access to the telephone network as described above in Figures 1 and 2 .
  • the network port 470 may also or alternatively be configured to couple to any of various possible cellular network entities, e.g., including one or more core network instances or core network slices of a cellular service provider, a network slice selection function, an access and mobility management function, a session management function, and/or various other possible cellular network entities.
  • the core network(s) may provide mobility related services and/or other services to a plurality of devices, such as UE devices 106.
  • the network port 470 may couple to a telephone network via the core network(s), and/or the core network(s) may provide a telephone network (e.g., among other UE devices serviced by the cellular service provider).
  • the base station 102 may include at least one antenna 434, and possibly multiple antennas.
  • the antenna(s) 434 may be configured to operate as a wireless transceiver and may be further configured to communicate with UE devices 106 via radio 430.
  • the antenna(s) 434 communicates with the radio 430 via communication chain 432.
  • Communication chain 432 may be a receive chain, a transmit chain or both.
  • the radio 430 may be configured to communicate via various wireless telecommunication standards, including, but not limited to, LTE, LTE-A, NR, UMTS, CDMA2000, Wi-Fi, etc.
  • the BS 102 may be configured to communicate wirelessly using multiple wireless communication standards.
  • the base station 102 may include multiple radios, which may enable the base station 102 to communicate according to multiple wireless communication technologies.
  • the base station 102 may include an LTE radio for performing communication according to LTE as well as a Wi-Fi radio for performing communication according to Wi-Fi.
  • the base station 102 may be capable of operating as both an LTE base station and a Wi-Fi access point.
  • the base station 102 may include a multimode radio which is capable of performing communications according to any of multiple wireless communication technologies (e.g., NR and LTE, NR and Wi-Fi, LTE and Wi-Fi, LTE and UMTS, LTE and CDMA2000, UMTS and GSM, etc.).
  • a multimode radio which is capable of performing communications according to any of multiple wireless communication technologies (e.g., NR and LTE, NR and Wi-Fi, LTE and Wi-Fi, LTE and UMTS, LTE and CDMA2000, UMTS and GSM, etc.).
  • the BS 102 may be configured to act as a node of a radio access network (RAN) of a cellular network.
  • the BS 102 may provide radio access to the cellular network (e.g., including one or more core network instances, as previously noted) to wireless devices.
  • the BS 102 may be configured to implement multiple possible RAN slices, e.g., to accomodate different scenarios with respect to RAN functionality, performance, isolation, etc.
  • the different RAN slices may include different sets of RAN functions, and/or differently configured RAN functions (e.g., having different resource pools, etc.).
  • the BS 102 may include hardware and software components for implementing and/or supporting implementation of features described herein.
  • the processor 404 of the base station 102 may be configured to implement or support implementation of part or all of the methods described herein, e.g., by executing program instructions stored on a memory medium (e.g., a non-transitory computer-readable memory medium).
  • the processor 404 may be configured as a programmable hardware element, such as an FPGA (Field Programmable Gate Array), or as an ASIC (Application Specific Integrated Circuit), or a combination thereof.
  • processor 404 of the BS 102 in conjunction with one or more of the other components 430, 432, 434, 440, 450, 460, 470 may be configured to implement or support implementation of part or all of the features described herein.
  • FIG. 5 Exemplary Block Diagram of a Network Element
  • Figure 5 illustrates an exemplary block diagram of a network element 500, according to some embodiments.
  • the network element 500 may implement one or more logical functions/entities of a cellular core network, such as an access and mobility management function (AMF) or mobility management entity (MME), a session management function (SMF), a serving gateway (S-GW), a network slice selection function (NSSF) entity, etc.
  • AMF access and mobility management function
  • MME mobility management entity
  • SMF session management function
  • S-GW serving gateway
  • NSSF network slice selection function
  • the core network element 500 may include processor(s) 504 which may execute program instructions for the core network element 500.
  • the processor(s) 504 may also be coupled to memory management unit (MMU) 540, which may be configured to receive addresses from the processor(s) 504 and translate those addresses to locations in memory (e.g., memory 560 and read only memory (ROM) 550) or to other circuits or devices.
  • MMU memory management unit
  • the network element 500 may include at least one network port 570.
  • the network port 570 may be configured to couple to one or more base stations and/or other cellular network entities and/or devices.
  • the network element 500 may communicate with base stations (e.g., eNBs) and/or other network entities / devices by means of any of various communication protocols and/or interfaces.
  • the network element 500 may include hardware and software components for implementing and/or supporting implementation of features described herein.
  • the processor(s) 504 of the core network element 500 may be configured to implement or support implementaiton of part or all of the methods described herein, e.g., by executing program instructions stored on a memory medium (e.g., a non-transitory computer-readable memory medium).
  • the processor 504 may be configured as a programmable hardware element, such as an FPGA (Field Programmable Gate Array), or as an ASIC (Application Specific Integrated Circuit), or a combination thereof.
  • Network slicing is a concept that may enable a cellular network operator to create customized networks to provide solutions for different market scenarios that have diverse requirements, e.g., in the areas of functionality, performance and isolation.
  • a cellular network may provide multiple network slices, of which each network slice may include a set of network functions (NFs) selected to provide some specific telecommunication service(s) and network capabilities, and the resources to run these NFs.
  • NFs network functions
  • a cellular communication system may typically utilize a registration process to initially register a wireless device to communicate using the cellular communication system.
  • a registration process may include any of various aspects, potentially including any or all of establishing context information, performing authentication and security procedures, obtaining access to one or more network slices, and/or any of various other aspects.
  • a wireless device that is registered with a cellular communication system may perform a registration update, e.g., to re-register with the cellular communication system.
  • 3GPP 5G NR specification documents may specify (e.g., in 3GPP TS 24.501, as one possibility) that a wireless device may or must perform re-registration when it receives updated (e.g., configured or allowed) network slice selection assistance information (NSSAI) in a UE configuration update procedure.
  • NSSAI network slice selection assistance information
  • the wireless device is expected to locally release any protocol data unit (PDU) sessions.
  • Figure 6 is a communication flow diagram illustrating a communication sequence in which such an exchange may occur.
  • a network element 500 may provide a wireless device 106 with a wireless device configuration update command message that includes a re-registration request IE.
  • the configuration update command may include an updated allowed NSSAI parameter, and/or an updated configured NSSAI parameter.
  • the wireless device 106 may respond with a wireless device configuration update indication.
  • the network element 500 may release the non-access stratum (NAS) signaling connection between the wireless device 106 and the network element 500, e.g., since registration was requested in the wireless device configuration update command.
  • NAS non-access stratum
  • the wireless device 106 may transmit a registration request to the network element 500, e.g., based on the wireless device configuration update command that requested registration.
  • the registration request may initiate the process of re-registering the wireless device 106 in accordance with the updated allowed or configured NSSAI.
  • the wireless device 106 may consider the old allowed or configured NSSAI to be invalid, and may release at least any PDU sessions associated with S-NSSAI(s) not included in the allowed/configured NSSAI.
  • the wireless device 106 may be forced to deactivate any ongoing operations by way of a configuration update command with re-registration requested. For example, an emergency or other call (e.g., in which case the call could be dropped), and/or one or more other mission critical operations, could be interrupted by such a configuration update, at least in some scenarios.
  • release of the NAS signaling connection may be delayed by the network element 500, e.g., for updated allowed NSSAI.
  • identity information e.g., a globally unique temporary identifier (GUTI)
  • GUI globally unique temporary identifier
  • delaying may not be supported for updated configured NSSAI. It may be desirable, at least in some instances, to provide a mechanism that can support avoiding releasing a session that is associated with a slice that is no longer available for critical sessions.
  • S-NSSAI may not be required to be sent by a UE when establishing an emergency PDU session, it may be preferable to avoid releasing an emergency session even if there is updated NSSAI for the UE.
  • NSSAI N-NSSAI
  • Figures 7-8 are flowchart diagrams illustrating methods for delaying re-registration during critical conditions.
  • Figure 7 illustrates a method for a cellular network to delay re-registration during critical conditions. Aspects of the method of Figure 7 may be implemented by a cellular network element (e.g., in conjunction with a wireless device), such as network element 500 illustrated in and described with respect to various of the Figures herein, or more generally in conjunction with any of the computer systems or devices shown in the above Figures, among other devices, as desired. Note that while at least some elements of the method of Figure 7 are described in a manner relating to the use of communication techniques and/or features associated with NR and/or 3GPP specification documents, such description is not intended to be limiting to the disclosure, and aspects of the method of Figure 7 may be used in any suitable wireless communication system, as desired.
  • a cellular network element e.g., in conjunction with a wireless device
  • some of the elements of the methods shown may be performed concurrently, in a different order than shown, may be substituted for by other method elements, or may be omitted. Additional method elements may also be performed as desired. As shown, the method of Figure 7 may operate as follows.
  • a wireless device may be registered for cellular service with a cellular network.
  • the wireless device may access the cellular network by way of a radio access network (RAN) provided by the cellular network, e.g., which may include cellular base stations that provide an over-the-air interface for wireless communication between the wireless device and the cellular base stations.
  • RAN radio access network
  • the cellular network may further include a core network (CN) (which may include various core network slices) that may include various network elements that provide a variety of functions / services to wireless devices communicatively coupled to the cellular network.
  • CN core network
  • the wireless device may perform wireless communication with the cellular network, which may include one or more data sessions for communicating data for one or more applications and/or functions executing at the wireless device.
  • the wireless device might communicate data for a voice call (e.g., which could be an emergency call or a non-emergency call), an email application, a web browser application, a video streaming application, a productivity application, a messaging application, and/or for any of various other possible purposes.
  • a network element serving the wireless device may determine to provide a configuration update command to the wireless device that requests re-registration of the wireless device.
  • the configuration update command may modify a set of network slices for the wireless device, such as by including updated allowed or configured NSSAI for the wireless device.
  • the network element may determine whether to provide the configuration update command immediately or to delay providing the configuration update. The decision may be made based at least in part on whether certain conditions are in effect at the wireless device, in response to which, the network element is configured to delay providing such a configuration update command. For example, conditions in which one or more communication activities are occurring that may particularly important to avoid interrupting may be defined as critical conditions at the wireless device. The network element may be able to determine if such conditions are in effect based on the type(s) of communication activity (e.g., as represented by one or more bearer types and/or any of various other information available to the network element) currently being performed between the wireless device and the cellular network.
  • the type(s) of communication activity e.g., as represented by one or more bearer types and/or any of various other information available to the network element
  • an emergency call (or any other protocol data unit session associated with emergency services) is occurring, this may be considered a critical condition.
  • Any number of other types of communication activities may similarly be considered critical conditions, e.g., depending on the configuration of the cellular network and/or the configuration of the wireless device.
  • the network element may delay providing the configuration update command based on the current conditions, e.g., if the network element determines that the wireless device is in a critical condition. For example, the network element may choose to not provide the configuration update command to the wireless device until the criticial condition is no longer in effect at the wireless device, and/or until one or more other specified conditions are met.
  • the amount of time that the network element chooses to delay providing a configuration update command in such circumstances may be limited, e.g., by a timer.
  • the network element may initiate a timer upon determining to delay providing the configuration update, and the network element may provide the configuration update (e.g., triggering the wireless device to perform re-registration) at expiration of the timer, e.g., even if the wireless device has not yet exited the critical condition at that time.
  • This may reduce the likelihood of a critical communication being interrupted by such a configuration update while preventing indefinite delay to provision of the configuration update command.
  • the network element may provide the configuration update command, based on which the wireless device may proceed to perform re-registration, at least in some instances.
  • Such a method may allow the cellular network to determine what conditions are considered critical and to determine whether to delay re-registration (e.g., by delaying providing a configuration update command that requests re-registration), and if so, for how long to delay re-registration.
  • the wireless device may determine what conditions are considered critical and whether (e.g., and potentially how long) to delay re-registration of the wireless device.
  • Figure 8 illustrates such a method for a wireless device to delay responding to a configuration update command that requires re-registration during critical conditions.
  • aspects of the method of Figure 8 may be implemented by a wireless device (e.g., in conjunction with one or more cellular network elements), such as a UE 106 illustrated in and described with respect to various of the Figures herein, or more generally in conjunction with any of the computer systems or devices shown in the above Figures, among other devices, as desired.
  • a wireless device e.g., in conjunction with one or more cellular network elements
  • UE 106 illustrated in and described with respect to various of the Figures herein, or more generally in conjunction with any of the computer systems or devices shown in the above Figures, among other devices, as desired.
  • some of the elements of the methods shown may be performed concurrently, in a different order than shown, may be substituted for by other method elements, or may be omitted. Additional method elements may also be performed as desired. As shown, the method of Figure 8 may operate as follows.
  • a wireless device may register for cellular service, e.g., with a cellular network.
  • the wireless device may access the cellular network by way of a radio access network (RAN) provided by the cellular network, e.g., which may include cellular base stations that provide an over-the-air interface for wireless communication between the wireless device and the cellular base stations.
  • RAN radio access network
  • the cellular network may further include a core network (CN) (which may include various core network slices) that may include various network elements that provide a variety of functions / services to wireless devices communicatively coupled to the cellular network.
  • CN core network
  • the wireless device may perform wireless communication with the cellular network, which may include one or more data sessions for communicating data for one or more applications and/or functions executing at the wireless device.
  • the wireless device might communicate data for a voice call (e.g., which could be an emergency call or a non-emergency call), an email application, a web browser application, a video streaming application, a productivity application, a messaging application, and/or for any of various other possible purposes.
  • the wireless device may receive a configuration update command requesting re-registration of the wireless device, e.g, from a network element of the cellular network.
  • the configuration update command may modify a set of network slices for the wireless device, such as by including updated allowed and/or configured NSSAI for the wireless device.
  • the wireless device may determine whether to respond immediately to the configuration update command or to delay responding, and/or whether to delay performing the re-registration. The decision may be made based at least in part on whether certain conditions are in effect at the wireless device in response to which the wireless device is configured to delay responding to such a Configuration update command by not sending UE Configuration Update Complete, or to delay performing the re-registration. For example, conditions in which one or more communication activities are occurring that may be particularly important to avoid interrupting may be defined as critical conditions at the wireless device. The wireless device may be able to determine if such conditions are in effect based on the type(s) of communication activity currently being performed by the wireless device. For example, if an emergency call (or any other protocol data unit session associated with emergency services) is occurring, this may be considered a critical condition. Any number of other types of communication activities may similarly be considered critical conditions, e.g., depending on the configuration of the wireless device.
  • the wireless device may delay responding to the configuration update command with re-registration required, and/or may delay performing the re-registration, based on the current conditions, e.g., if the wireless device determines that the wireless device is in a critical condition. For example, the wireless device may choose to not respond to the configuration update command provided by the network element until the criticial condition is no longer in effect at the wireless device, and/or until one or more other specified conditions are met. As another possibility, the wireless device may acknowledge the configuration update command, but may delay performing the re-registration until the criticial condition is no longer in effect at the wireless device, and/or until one or more other specified conditions are met.
  • the amount of time that the wireless device chooses to delay responding to a configuration update command and/or performing re-registration in such circumstances may be limited, e.g., by a timer.
  • the wireless device may initiate a timer upon determining to delay responding to the configuration update command or performing re-registration, and the wireless device may respond to the configuration update and/or proceed to perform re-registration at expiration of the timer, e.g., even if the wireless device has not yet exited the critical condition at that time.
  • This may reduce the likelihood of a critical communication being interrupted by such a configuration update command while preventing the wireless device from delaying re-registration indefinitely.
  • the wireless device may proceed to perform re-registration (e.g., including responding to the configuration update command if it has not already done so), at least in some instances.
  • the wireless device may transmit the response to the configuration update command and perform re-registration immediately (e.g., at the next available opportunity) after receiving the configuration update command.
  • Figures 9-10 are communication flow diagrams illustrating possible further details of methods that could be used for delaying wireless device re-registration during critical conditions, according to some embodiments. Note that Figures 9-10 and the following information are provided as being illustrative of further considerations and possible implementation details relating to the methods of Figures 7-8 , and are not intended to be limiting to the disclosure as a whole. Numerous variations and alternatives to the details provided herein below are possible and should be considered within the scope of the disclosure.
  • one possibility for delaying wireless device re-registration during critical conditions may include implementing a mechanism for such delay on the cellular network side.
  • Figure 9 illustrates a communication flow diagram in accordance with such a mechanism in a possible 5G NR context.
  • the AMF may determine if any critical operation is ongoing at the UE.
  • a 'critical' operation may be defined to include any of various possible operations, as desired.
  • One possibility may include an active bearer for "emergency”.
  • Other possibilities may include services with 5QI 70 (mission critical data) or multimedia priority service (MPS) activity, at least according to some embodiments.
  • 5QI 70 transmission critical data
  • MPS multimedia priority service
  • the AMF may refrain from sending a UE configuration update command requiring re-registration to the UE.
  • the AMF may deactivate all PDU sessions that were not allocated for critical services. The AMF may follow up, sending the UE configuration update command requiring re-registration, after criticality ceases.
  • such operation may be similar to possible mechanisms for handling detach requests during active PDU sessions for emergency services. For example, for de-registration and/or detach requests, AMF and/or MME entities refrain from sending such messages to a UE that has bearers for emergency services, at least according to some embodiments.
  • FIG. 10 illustrates a communication flow diagram in accordance with such a mechanism in a possible 5G NR context.
  • the UE may determine if any critical operation is ongoing at the UE.
  • a 'critical' operation may be defined to include any of various possible operations, as desired.
  • One possibility may include an active bearer for "emergency”.
  • Other possibilities may include services with 5QI 70 (mission critical data) or multimedia priority service (MPS) activity, at least according to some embodiments.
  • 5QI 70 transmission critical data
  • MPS multimedia priority service
  • the AMF provides a UE configuration update command requiring re-registration to the UE.
  • the UE may refrain from responding to (e.g., acknowledging) the UE configuration update command.
  • the UE may additionally not start its timer T3540.
  • the T3555 timer may expire at the AMF, and in 1006, the AMF may retry providing the UE configuration update command.
  • the UE may again refrain from responding to / acknowledging the UE configuration update command or starting its timer T3540.
  • the network may be configured to retransmit the configuration update command up to four times, after which the procedure may be aborted. In such an instance, the network may determine to attempt such a procedure again at a later time, among various possibilities.
  • the critical condition occurring at the UE may end.
  • the AMF may retransmit the UE configuration update command message after the critical condition has ended.
  • the UE may respond to / acknowledge the UE configuration update command.
  • the AMF may follow up with a NAS signaling release message.
  • the UE may transmit a registration request with updated NSSAI and GUTI information (e.g., in accordance with the UE configuration update).
  • One set of embodiments may include a method, comprising: by a wireless device: registering for cellular service with a cellular network; receiving a configuration update command from a network element of the cellular network, wherein the configuration update command requests re-registration of the wireless device; and determining to delay responding to the configuration update command based at least in part on one or more conditions in effect at the wireless device.
  • the method further comprises: determining that the one or more conditions are no longer in effect at the wireless device; and responding to the configuration update command after the one or more conditions are no longer in effect at the wireless device.
  • the wireless device is configured to delay re-registration while one or more communication activity types are occurring; wherein the one or more conditions in effect at the wireless device comprise the specified communication activity types.
  • one or more conditions in effect at the wireless device comprise an active emergency call.
  • Another set of embodiments may include a method, comprising: by a cellular network element of a cellular network: determining to provide a configuration update command to the wireless device, wherein the configuration update command requests re-registration of the wireless device; determining one or more communication activity types currently being performed by the wireless device; and delaying providing the configuration update command to the wireless device based at least in part on one or more communication activity types currently being performed by the wireless device.
  • the method further comprises: receiving configuration information indicating to delay re-registration of wireless devices that are performing one or more communication activity types specified as critical communication activity types, wherein the one or more communication activity types currently being performed by the wireless device comprise at least one critical communication activity type.
  • the method further comprises: determining, at a later time, that no critical communication activity types are currently being performed by the wireless device; and providing the configuration update command to the wireless device based at least in part on determining that no critical communication activity types are currently being performed by the wireless device.
  • the one or more communication activity types currently being performed by the wireless device comprise an active emergency call, wherein delaying providing the configuration update command to the wireless device is based at least in part on the active emergency call.
  • Another exemplary embodiment may include a device, comprising: an antenna; a radio coupled to the antenna; and a processing element operably coupled to the radio, wherein the device is configured to implement any or all parts of the preceding examples.
  • a yet further exemplary embodiment may include a non-transitory computer accessible memory medium comprising program instructions which, when executed at a device, cause the device to implement any or all parts of any of the preceding examples.
  • a still further exemplary embodiment may include a computer program comprising instructions for performing any or all parts of any of the preceding examples.
  • Yet another exemplary embodiment may include an apparatus comprising means for performing any or all of the elements of any of the preceding examples.
  • Still another exemplary embodiment may include an apparatus comprising a processing element configured to cause a wireless device to perform any or all of the elements of any of the preceding examples.
  • personally identifiable information should follow privacy policies and practices that are generally recognized as meeting or exceeding industry or governmental requirements for maintaining the privacy of users.
  • personally identifiable information data should be managed and handled so as to minimize risks of unintentional or unauthorized access or use, and the nature of authorized use should be clearly indicated to users.
  • Embodiments of the present disclosure may be realized in any of various forms. For example some embodiments may be realized as a computer-implemented method, a computer-readable memory medium, or a computer system. Other embodiments may be realized using one or more custom-designed hardware devices such as ASICs. Still other embodiments may be realized using one or more programmable hardware elements such as FPGAs.
  • a non-transitory computer-readable memory medium may be configured so that it stores program instructions and/or data, where the program instructions, if executed by a computer system, cause the computer system to perform a method, e.g., any of a method embodiments described herein, or, any combination of the method embodiments described herein, or, any subset of any of the method embodiments described herein, or, any combination of such subsets.
  • a device e.g., a network element 500
  • a device may be configured to include a processor (or a set of processors) and a memory medium, where the memory medium stores program instructions, where the processor is configured to read and execute the program instructions from the memory medium, where the program instructions are executable to implement any of the various method embodiments described herein (or, any combination of the method embodiments described herein, or, any subset of any of the method embodiments described herein, or, any combination of such subsets).
  • the device may be realized in any of various forms.

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